Can this code be refined a bit more?

[shirrokurro]

I'm wondering if the code below can be refined a bit. I feel that some parts of it seems odd just looking at it. I know there are many ways to solve a problem. The comments before each for loop is the output of the code. I've studied Java a long time ago and I'm picking it back up again because I've forgotten too much Thanks in advance.

public class PrintingPatterns {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) 
    {
        //Pattern 1
        //1 
        //1 2 
        //1 2 3 
        //1 2 3 4 
        //1 2 3 4 5 
        //1 2 3 4 5 6 
        for ( int i = 1; i <= 6; ++i )
        {
            for ( int j = 1; j <= i; ++j )
            {
                System.out.print( j + " " );
            }
            
            System.out.println();
        }
        
        System.out.println();
        
        //Pattern 2
        //1 2 3 4 5 6 
        //1 2 3 4 5 
        //1 2 3 4 
        //1 2 3 
        //1 2
        //1 
        for ( int i = 0; i <= 6; ++i )
        {
            for ( int j = 1; j <= 6 - i; ++j )
            {
                System.out.print( j + " " );
            }
            
            System.out.println();
        }       
     
        //Pattern 3
        //          1
        //        2 1
        //      3 2 1
        //    4 3 2 1
        //  5 4 3 2 1
        //6 5 4 3 2 1 
        for ( int i = 6; i >= 1; --i )
        {
            for ( int j = 1; j <= i - 1; ++j )
            {
                System.out.print( "  " );
            }
            
            for ( int k = 6; k >= i; --k )
            {
                System.out.print( ( k - i + 1 ) + " " );
            }
            System.out.println();
        }
        
        System.out.println();
        
        //Pattern 4
        //1 2 3 4 5 6
        //  1 2 3 4 5
        //    1 2 3 4
        //      1 2 3
        //        1 2
        //          1
        for ( int i = 6; i >= 1; --i )
        {
            for ( int j = 1; j <= i; ++j )
            {
                System.out.print( j + " " );
            }
            
            System.out.println();
            
            for ( int k = 6; k >= i; --k )
            {
                System.out.print( "  " );
            }
        }
    }
}

[Petr]

I think you must select a common part and do an one method, which will do all functions. Because you have two loop every time. Just change iteration condition.